1 files changed, 44 insertions, 0 deletions
diff --git a/python/gevent/__greenlet_primitives.pxd b/python/gevent/__greenlet_primitives.pxd
new file mode 100644
index 0000000..18381f1
--- /dev/null
+++ b/python/gevent/__greenlet_primitives.pxd
@@ -0,0 +1,44 @@
+cimport cython
+
+# This file must not cimport anything from gevent.
+
+cdef wref
+
+cdef BlockingSwitchOutError
+
+
+cdef extern from "greenlet/greenlet.h":
+
+    ctypedef class greenlet.greenlet [object PyGreenlet]:
+        pass
+
+    # These are actually macros and so much be included
+    # (defined) in each .pxd, as are the two functions
+    # that call them.
+    greenlet PyGreenlet_GetCurrent()
+    object PyGreenlet_Switch(greenlet self, void* args, void* kwargs)
+    void PyGreenlet_Import()
+
+@cython.final
+cdef inline greenlet getcurrent():
+    return PyGreenlet_GetCurrent()
+
+cdef bint _greenlet_imported
+
+cdef inline void greenlet_init():
+    global _greenlet_imported
+    if not _greenlet_imported:
+        PyGreenlet_Import()
+        _greenlet_imported = True
+
+cdef inline object _greenlet_switch(greenlet self):
+    return PyGreenlet_Switch(self, NULL, NULL)
+
+cdef class TrackedRawGreenlet(greenlet):
+    pass
+
+cdef class SwitchOutGreenletWithLoop(TrackedRawGreenlet):
+    cdef public loop
+
+    cpdef switch(self)
+    cpdef switch_out(self)